in view of the universe is unlimited and we know little about it ,of course ,our earth is just one of millions of planets in the universe ,it is very likely exist one planet has some new creature .Probing the outspace is a permanent task for human-being.we should do some preparation in case of alients invade earth.

"I’ve often wondered...what if all of us in the world discovered that we were threatened by an outer - a power from outer space, from another planet. Wouldn’t we all of a sudden find that we didn’t have any differences between us at all, we were all human beings, citizens of the world, and wouldn’t we come together to fight that particular threat . . ."

Alien life forms exist outside the earth. Believe or not, it's still the quite mysterious question. This is the matter of belief,namely totally dependent upn your mind not based on practical scientific evidences. We already know about alien life forms through numberous scientific articles and stories involved. And each story has its uniqueness featured by additional exciting details. But do I believe that? My answer is both No and Yes. (50% for each of both)
-No,because I haven't seen the alien forms with my own eyes, but only hear lots of papers relating that.
-Yes,for I find myself that life is mysterious, and so many things still unanswered. It's the mystery that enables us to be persistent silent as dealing with something invisible or unknown to mankind. But, on the other hand, we hardly stay calm regarding discoveries and searches anything outside the earth.
You don't cope with whatever related to earth, with so many amazingly enigmatic things concerning our current life, how can you advance the complex questions outside of your own existence right in this earth?. Confucius rarely talked about evil spirits because " we havent yet dealt with earthly things, why we interested in ghosts and devils ? "
However, to my part, I think that if we are human that have life, our life would not stand alone. Why?
We have flesh and spirit encompasing our whole life, which makes us naturally feeling something utterly unexplained. With scientificaly inexplicable things giving no practical evidences, there will exists trust or distrust. I dont know how to express that in the practical term
That's the individual problem, which is the same as whether you believe or disbelieve certain supernatural power .

Firstly, we need to define what kind of life we are talking about. It´s been proven that there are other ways of life,such as microbes, bacterias, organic molecules, etc. The problem has been our perception of alien life. When somebody talk about aliens, we inmediately imagine a little, bold guy, with big eyes and sharp-pointed ears who will come to earth to kill us. I don´t believe that those guys exist.

However, more and more planets have been discovered, so who knows? Maybe in one of those planet we could find a alien who we can commmunicate with...

Do you believe we were the reason the universe was made? Do you believe THE EARTH was the "ONLY ONE" in the universe? I believe there are some creatures unknow exist in some place in the universe,and i expect the day we can get there.

I agree with you, Keeper. We are not the only reason of creation the Universe. I believe in another life forms on other planet but I think we cannot recognize them. Our mind and perceive are so limited and disabled. I recommend all of you the novel SOLARIS by Stanislaus Lem - he imagined a very unique world. For me it's fascinating and it tells so much about us...

i did believe there were aliens when i was a kid and i do hope there are aliens but just some of the time....

Seeing is believing and life isnot alwasys composed of theories. No concrete proof shows there are aliens until now.......so when i was typing the post i didn't believe but maybe i change my idea after i doing it.......

by my sixth sense,there might be some weird creatures live in other planet--we can not confirm through nowadays technology,but current science fiction/story/magzine always show such world to us like movie star wars.but,what if such guys look like,if they exist in the cosmos?are they like humanbeings or enormouse moster like a dinosaur's head with a ant's body???

I went camping with my extended family last time. While we were checking out the stars, the idea of aliens and other forms of life came up. My cousin had one interesting idea that I liked it very much. He believes that one day humans could create a time machine to travel back and forth in time. Therefore, aliens, some people believe they have seen, might just be people of the future going back to check out the past. We're not there yet; that's why we called them aliens.